import sys


n = int(sys.stdin.readline().strip())
print(n)
ans = 0
lst = []
for i in range(1, n +1):
    line = sys.stdin.readline().strip()
    lst.append(line)

if len(lst) > 1:
    s1 = ''
    for i in range(len(lst)):
        s += i
        for k in range(i, len(lst)):
            if s


